US3687292A - Apparatus for the removal of filter cake by liquid injection - Google Patents

Apparatus for the removal of filter cake by liquid injection Download PDF

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Publication number
US3687292A
US3687292A US76094A US3687292DA US3687292A US 3687292 A US3687292 A US 3687292A US 76094 A US76094 A US 76094A US 3687292D A US3687292D A US 3687292DA US 3687292 A US3687292 A US 3687292A
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United States
Prior art keywords
filter
chamber
injection
filter material
chambers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US76094A
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English (en)
Inventor
Mitsugi Miura
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/164—Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/32—Removal of the filter cakes
    • B01D25/38—Removal of the filter cakes by moving parts, e.g. scrapers, contacting stationary filter elements sprayers
    • B01D25/386—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/39—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
    • B01D29/41—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles

Definitions

  • iniecfiml Water is Sprayed (mm the Cake 58 Field 61 Search....2l0/67, 79, 81, 106,225, 391, after the t a n proeess has been completed by 210/409 openlng the 1n ect1on sl1t whlch extends the width of the cloth by the pressure of the high pressure injection water, and the angle between the injection guide plate [56] References cued and the filter cloth is changed in order to cause the in- UNITED STATES PATENTS jection water to collide with every part of filter cake.
  • the main object of this invention is to provide an apparatus for easily and efiectively removing filter cake accumulated on a filter medium.
  • FIG. 1 is a front view, partly in section, of the conventional apparatus of a filter for the removal of filter cake by liquid injection.
  • FIG. 2 is a side sectional view along line II II of FIG. 1.
  • FIG. 3 is a sectional view of an apparatus for the removal of filter cake by liquid injection according to this invention.
  • FIG. 4 (A) and (B) are enlarged views illustrating the open and closed states of the movable injecting guide plate in the apparatus shown in FIG. 3.
  • FIG. 5 is an enlarged view of another embodiment of the movable injection guide plate.
  • FIG. 6 is an enlarged view of still another embodiment of the movable injecting guide plate.
  • FIGS. 1 and 2 a conventional apparatus for the removal of filter cake 5 by liquid injection.
  • liquid to be filtered is supplied from inlet 8 under pressure.
  • the supplied liquid is filtered by filter leaf 4 and then recovered from holes provided in shaft 3.
  • filter cake 5 there remains filter cake 5 on filter leaf 4.
  • liquid to which pressure is applied by pump 7 is jetted through pipe 1 from nozzles 6 provided in pipe 2 of apparatus 10 so as to wash and remove filter cake 5.
  • Filter leaf 4 is rotated by shaft 3 to wash the whole of the filter leaf.
  • the filter cake so washed is expelled from the apparatus via pipe 9.
  • FIG. 3 shows raw liquid passages l l, raw liquid inlets 12 to filter chambers 13, filter cloths 14, filtrate chambers 15, outlets 16 from filtrate chambers discharging into filtrate passages 17, injection water passages 18 connected via the injection water outlets 19 to filter chambers 15, injection water guides 20 at the end of the filter cloth extending across the width thereof and being supported by supports 21, narrow injection slits 22 formed between the guide plate and the filter cloth and stretching the width of the filter cloth, and layer of filter cake 23.
  • FIG. 4 (A) shows the movable guide plate 26 sticking to the filter cloth 14 or the filter cloth support and effectively closing the injection slit. (The edges of the filter cloth are sometimes bonded to the filter plate with rubber in order to form an airtight seal.
  • both the filter cloth and filter plate are referred to as filter cloth).
  • FIG. 4 (B) shows the movable guide 26 in the open position i.e. separated from the filter cloth.
  • a filter cake layer 23 forms on the surface of the filter cloth 14.
  • the raw liquid remaining in the filter chamber 13 is-discharged.
  • the filter cake layers are then washed from the filter cloths by the action of the injection water sprays issuing from the injection slits over the width of the filter cloth.
  • the filtration process begins again.
  • the injection slits extend the whole width of the filter cloth and because the water issuing from the narrow-slits (1.0 or 1.5 mm) impinges with high velocities over every part of the filter cloth, the whole of the filter cake is effectively removed.
  • This invention has the advantage over conventional methods in that it avoids the .use of complicated mechanisms.
  • the injection guide plates are shown at an angle to the filter cloth. Alternatively they may be mounted parallel to the filter cloth. Further, they may be eliminated altogether and the injection water outlet passages be used instead of injection slits. Any shape of injection slit may be used provided that it is narrow and extends the width of the cloth.
  • raw water can enter the injection passages and may block them by deposition of solid material which would prevent further operation.
  • FIG. 4 indicates that the guide plates are made of flexible material such as rubber, plastic -or thin metals.
  • the guide plates are pressed on to the filter cloth by the pressure of the raw liquid duringthe filtration cycle thus preventing the entry of raw liquid into the injection water passages as shown in FIG. 4 (A).
  • FIG. 4
  • the guide plate supports 21 do not allow the injection slits to open too .far.
  • flexible matter such as rubber is used as the material of a movable guide plate
  • FIG. 5 (A) the guide plate is bent, sticks to the filter cloth more closely and prevents water containing solid particles from flowing into the injection chamber during the filtration cycle.
  • FIG. 5 (B) indicates that during the washing cycle the movable guide plate vibrates over a narrow range owing to the changes in speed and pressure of the injection water from the slit and the angle formed between the guide plate and the filter cloth van'es to a small extent, which causes the direction and speed of injection water to change a little. For this reason, injection water is made to collide with every part of filter cake and consequently leads to the effective removingof filter cake.
  • FIGS. 6 (A) and 6 (B) indicates such a method. Contact is made between the guide plates and filter cloth by inflating a to 20 seconds by this technique and so the filtration operation is easier and the capital cost less than with conventional cake washing and removal equipment.
  • injection slit openings extend the width of the filter cloth and are without intervals.
  • a plurality of slits may be used at short intervals to maintain the strength thereof
  • a vertical filter with a rectangular filter cloth is used.
  • This invention may also be applied to horizontal filters or circular filter cloths.
  • a filter apparatus to filter liquid comprising in combination:
  • first, second and third parallel longitudinal chambers said second chamber being a middle chamber, said first and third chambers being on both sides of said second chamber, inlet means at one end of said second chambers defining the input side of the chamber and outlets at the ends of said first and third chambers opposite said input side;
  • a filter material wall extending between said first and second as well as said second and third chamber so that liquid entering said second chamber inlet means has to pass through said filter to exit through said first and third chamber outlets;
  • V d tapered, extended guide means extending from said second inlet means next to said injection outlets said guide means extending towards said filter material and further extending across the entire width of said filter material to apply water pressure against cake layer clogging said filter to wash it off.
  • said guide means having an inner wall which curves in the d' tio fs 'dfilt mtrial.
  • said guide means including a tip which is moveable to and away from said filter material so as to direct wash fluid to parts along the entire length of the filter material.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Cleaning By Liquid Or Steam (AREA)
US76094A 1969-10-01 1970-09-28 Apparatus for the removal of filter cake by liquid injection Expired - Lifetime US3687292A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44078345A JPS4836222B1 (de) 1969-10-01 1969-10-01

Publications (1)

Publication Number Publication Date
US3687292A true US3687292A (en) 1972-08-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US76094A Expired - Lifetime US3687292A (en) 1969-10-01 1970-09-28 Apparatus for the removal of filter cake by liquid injection

Country Status (4)

Country Link
US (1) US3687292A (de)
JP (1) JPS4836222B1 (de)
DE (1) DE2048342A1 (de)
GB (1) GB1329616A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107670374A (zh) * 2016-08-01 2018-02-09 靖江康爱特环境工程有限公司 一种定量雾化喷淋装置
WO2019038465A1 (en) * 2017-08-23 2019-02-28 Outotec (Finland) Oy LIQUID FILTRATION APPARATUS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233578A (en) * 1989-07-01 1991-01-16 Edwards & Jones Filtering yeast slurry

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US798200A (en) * 1904-01-02 1905-08-29 Charles W Merrill Process of removing solid or semisolid material from containers of pressure-filters.
US1226104A (en) * 1910-06-07 1917-05-15 Charles W Merrill Process for treating semisolid material in the containers of filter-presses and removing the same therefrom.
US1302813A (en) * 1915-10-30 1919-05-06 Merrill Metallurg Company Process of maintaining filters in filtering condition.
US2737300A (en) * 1952-03-26 1956-03-06 Aloysius C Kracklauer Wash-off plate filter apparatus
US3285417A (en) * 1964-01-16 1966-11-15 Industrial Filter Pump Mfg Co Filter sluicing method and apparatus
US3329274A (en) * 1966-01-14 1967-07-04 Landon Inc Jet-spray tube and diverter valve for disc-type filter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US798200A (en) * 1904-01-02 1905-08-29 Charles W Merrill Process of removing solid or semisolid material from containers of pressure-filters.
US1226104A (en) * 1910-06-07 1917-05-15 Charles W Merrill Process for treating semisolid material in the containers of filter-presses and removing the same therefrom.
US1302813A (en) * 1915-10-30 1919-05-06 Merrill Metallurg Company Process of maintaining filters in filtering condition.
US2737300A (en) * 1952-03-26 1956-03-06 Aloysius C Kracklauer Wash-off plate filter apparatus
US3285417A (en) * 1964-01-16 1966-11-15 Industrial Filter Pump Mfg Co Filter sluicing method and apparatus
US3329274A (en) * 1966-01-14 1967-07-04 Landon Inc Jet-spray tube and diverter valve for disc-type filter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107670374A (zh) * 2016-08-01 2018-02-09 靖江康爱特环境工程有限公司 一种定量雾化喷淋装置
WO2019038465A1 (en) * 2017-08-23 2019-02-28 Outotec (Finland) Oy LIQUID FILTRATION APPARATUS
US10773189B2 (en) 2017-08-23 2020-09-15 Outotec (Finland) Oy Liquid filtration apparatus

Also Published As

Publication number Publication date
JPS4836222B1 (de) 1973-11-02
DE2048342A1 (de) 1972-04-06
GB1329616A (en) 1973-09-12

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